Video output options are limited. See description.

As Apple offers this adapter for HDMI output, which is limited resolution, question one is can you then use a HDMI to DVI adapter to connect a DVI monitor? Secondly, the specs page says (in part) "Simultaneously supports full native resolution on the built-in display and up to 3840 by 2160 pixels on an external display, both at millions of colors" and later "Native DisplayPort 1.2 video output" So that would support this resolution, at unknown refresh rate, but how? Will there be another forthcoming USB-C to mini DisplayPort adapter that could then be re-adapted to Dual-Link DVI or connected to a supported UHD display?